如何用python画条形图 代码有哪些

在日常操作或是项目的实际应用中，有不少朋友对于“如何用python画条形图，代码是什么”的问题会存在疑惑，下面小编给大家整理和分享了相关知识和资料，易于大家学习和理解，有需要的朋友可以借鉴参考，下面我们一起来了解一下吧。

在做毕设的过程中有些数据用表格来展现，会很难看出数据之间的差别，凸显不出数据的特点，所以想制作一个条形图，这里特地记录下，已备以后用到。

import numpy as np

import matplotlib.pyplot as plt

import matplotlib

#指定默认字体

matplotlib.rcParams['font.sans-serif'] = ['FangSong']

matplotlib.rcParams['font.family']='sans-serif'

c101= (8,7,3,7,10,4,11,8,11,10,8,9)

c102= (21,21,24,25,16,17,11,24,24,25,36,33)

c103= (4,4,10,3,9,8,12,2,4,5,2,6)

c104= (1,5,1,3,2,3,3,3,6,5,1,0)

c105= (3,1,0,1,3,3,1,2,0,0,0,0)

c106= (1,2,0,0,1,1,0,0,1,1,0,0)

c107= (1,0,1,0,0,1,0,0,0,0,0,0)

c108= (0,1,0,0,0,2,1,1,0,1,0,0)

c109= (1,0,1,1,0,0,1,1,0,0,0,0)

ind = np.arange(0,24,2) # the x locations for the groups

width = 0.2  # the width of the bars

fig,ax = plt.subplots()

rects1 = ax.bar(ind + width, c101, width, color='SkyBlue',align='edge', label='101')

rects2 = ax.bar(ind + 2*width, c102, width,color='IndianRed',align='edge', label='102')

rects3 = ax.bar(ind + 3*width, c103, width, color='Cyan',align='edge', label='103')

rects4 = ax.bar(ind + 4*width, c104, width, color='Magenta',align='edge', label='104')

rects5 = ax.bar(ind + 5*width, c105, width, color='Purple',align='edge', label='105')

rects6 = ax.bar(ind + 6*width, c106, width, color='Green',align='edge', label='106')

rects7 = ax.bar(ind + 7*width, c107, width, color='Yellow',align='edge', label='107')

rects8 = ax.bar(ind + 8*width, c108, width, color='Blue',align='edge', label='108')

rects9 = ax.bar(ind + 9*width, c109, width, color='Orange',align='edge', label='109')

# Add some text for labels, title and custom x-axis tick labels, etc.

#ax.set_title('Scores by group and gender')

plt.xticks(ind,('1班', '2班', '3班', '4班', '5班','6班','7班','8班','9班','10班','11班','12班'))

ax.legend(loc='upper center')

plt.show()

fig.savefig('./test77.jpg')

竖起来的

%matplotlib notebook

import matplotlib.pyplot as plt

import pandas as pd

import numpy as np

import seaborn as sns

import matplotlib

#指定默认字体

matplotlib.rcParams['font.sans-serif'] = ['FangSong']

matplotlib.rcParams['font.family']='sans-serif'

#解决负号'-'显示为方块的问题

matplotlib.rcParams['axes.unicode_minus'] = False

data = [[8, 21, 4, 1, 3, 1, 1, 0, 1],

        [7,21,4,5,1,2,0,1,0], 

        [3,24,10,1,0,0,1,0,1],

        [7,25,3,3,1,0,0,0,1], 

        [10,16,9,2,3,1,0,0,0], 

        [4,17,8,3,3,1,1,2,0], 

        [11,11,12,3,1,0,0,1,1], 

        [8,24,2,3,2,0,0,1,1], 

        [11,24,4,6,0,1,0,0,0], 

        [10,25,5,5,0,1,0,1,0], 

        [8,36,2,1,0,0,0,0], 

        [9,33,6,0,0,0,0,0]]

df = pd.DataFrame(data,

                 index=['1班','2班','3班','4班','5班','6班','7班','8班','9班','10班','11班','12班'],        columns=pd.Index(['101','102','103','104','105','106','107','108','109']),

                 )

df.plot(kind='barh',figsize=(5,8)) 

plt.show()

#fig.savefig('./test2.jpg')

到此，关于“如何用python画条形图，代码是什么”的学习就结束了，希望能够解决大家的疑惑，另外大家动手实践也很重要，对大家加深理解和学习很有帮助。

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